The text presents a summary of several studies and a book review. The studies focus on the impact of extreme weather events on mortality rates, the effects of air pollution on mortality, and the health effects of particulate matter. The first study, by Huynen et al., examines the impact of heat waves and cold spells on mortality in the Dutch population. The second study, by the Eurowinter Group, investigates the relationship between cold exposure and winter mortality from various diseases in different European regions. The third study, by Katsouyanni et al., explores the short-term effects of air pollution on mortality in European cities. The fourth study, by Hetland et al., discusses the release of cytokines from alveolar macrophages exposed to particulate matter. The fifth study, by Kulkarni et al., examines the presence of carbon in airway macrophages and its effect on lung function in children. The book review discusses "Mental Health Systems Compared: Great Britain, Norway, Canada, and the United States," edited by Olson. The book provides an overview of mental health systems in these four countries, comparing their structures, policies, and services. It includes chapters on the description, evaluation, and recommendations for each country's mental health system. The book is useful for professionals working in mental health, particularly in the mentioned countries, but could be more relevant if it included systems from different cultural and developmental backgrounds. The book is also reviewed in the context of "Decision Modelling for Health Economic Evaluation," edited by Briggs, Sculpher, and Claxton. This book provides a practical guide to health economic evaluation, including case studies and exercises. It is useful for practitioners in health economics but assumes a basic understanding of health economics. The book also discusses the limitations of models in representing reality and the importance of considering health policy objectives in decision-making.The text presents a summary of several studies and a book review. The studies focus on the impact of extreme weather events on mortality rates, the effects of air pollution on mortality, and the health effects of particulate matter. The first study, by Huynen et al., examines the impact of heat waves and cold spells on mortality in the Dutch population. The second study, by the Eurowinter Group, investigates the relationship between cold exposure and winter mortality from various diseases in different European regions. The third study, by Katsouyanni et al., explores the short-term effects of air pollution on mortality in European cities. The fourth study, by Hetland et al., discusses the release of cytokines from alveolar macrophages exposed to particulate matter. The fifth study, by Kulkarni et al., examines the presence of carbon in airway macrophages and its effect on lung function in children. The book review discusses "Mental Health Systems Compared: Great Britain, Norway, Canada, and the United States," edited by Olson. The book provides an overview of mental health systems in these four countries, comparing their structures, policies, and services. It includes chapters on the description, evaluation, and recommendations for each country's mental health system. The book is useful for professionals working in mental health, particularly in the mentioned countries, but could be more relevant if it included systems from different cultural and developmental backgrounds. The book is also reviewed in the context of "Decision Modelling for Health Economic Evaluation," edited by Briggs, Sculpher, and Claxton. This book provides a practical guide to health economic evaluation, including case studies and exercises. It is useful for practitioners in health economics but assumes a basic understanding of health economics. The book also discusses the limitations of models in representing reality and the importance of considering health policy objectives in decision-making.